Notices of Memoirs. 35 
Sur LA CRAIE GLAUCONIEUSE DU NORD-OUEST DU Bassin DE Paris. Par M. Hiserr 
(Comptes Rendus), 7 mars 1864, 
[yak author proposes to describe this deposit as it occurs in a 
triangular area, the base measuring about 374 miles, from Fécamp 
to ‘Trouville, and the perpendicular 81 miles, from Trouville to Ver- 
non. The lower member of the deposit rests on the Gault, or on the 
Neocomian conglomerate, and is distinctly marked by the occurrence 
of the characteristic sand; in the former case the Gault concretions 
are mixed with the hottom Greensands. ‘There are eight horizons, 
with a total thickness of 82 yards. They form two divisions, the 
lower being separated from the upper by a slight stratigraphical 
break. The various subdivisions are connected by common fossils 
and similarity of mineral character. The upper limit of the Upper 
Greensand in this district is also sharply defined; the beds being 
separated from the Chalk-marl by a break, indicating an intermediate 
elevation of the sea-bottom. A characteristic species, however, of 
the upper beds of Upper Greensand, Pseudodiadema variolare, has 
been found by the author, with Hemiaster Verneuilli (a Chalk species), 
in the Chalk-marl on the right bank of the Seine. 
The Upper Greensand is found on the northern coast of Calvados, 
near Tronville, at the height of about 330 feet, capping first the 
Jurassic rocks, and afterwards the ferruginous sands of the Lower 
Cretaceous rocks, Dipping ENE., it is seen about half-way up the 
cliff at Havre and Honfleur; the dip throughout being from one to 
ten ina thousand. Dipping continually in the same direction, the 
upper beds, at first denuded, are gradually brought into view; and 
the beds are buried under the overlying deposits, and lost sight of at 
the surface about a mile and a quarter to the west of Etretat. They 
reappear, by a fault, at Lillebonne. 
Besides the known disturbances by which this formation has been 
affected, the author describes a fault at Villequier, on the right bank 
of the Seine, where the sands are brought up to 264 feet above the 
sea. This very considerable upheaval forms an amphitheatre round 
the village of Villequier, and the beds are on a NW. and SE. anti- 
clinal, dipping away about 45° to SW. and 30° to NE.—D. T. A. 
Diz Stapr unp Umexpune von Ormitz. Enr crorociscur Sxizzm zur Ertiv- 
TERUNG DER VERHALTNISSE IHRER WASSERQUELLEN. Von Hurnricn Wo tr. 
[The Town and Vicinity of Olmiitz: a Geological Sketch in Explanation of the 
Conditions of their Water Supply.] (Jahrb. k. k. geol. Reichsanst. vol. xiii. 1863.) 
(5 Re4r difficulty having been experienced within the last thirty 
years in obtaining drinking water for the garrison and town of 
Olmiitz, attempts were unsuccessfully made from time to time on a 
large scale to discover a supply by boring in the artesian method. 
These attempts were made without any idea of the geological con- 
ditions. The author submits an account of the geology to prevent 
future experiments, the failure of which may be readily predicted, 
The tower of the Rath-Haus in Olmiitz is 810 feet above the sea, 
the wooded heights to the west are 1,386 feet; and these heights 
extend southward for some distance. To the east we have the 
D 2 
